<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <meta http-equiv="X-UA-Compatible" content="ie=edge">
    <title>dataZoom</title>
     <!-- 引入 echarts.js -->
    <script src="../echarts.min.js"></script>
</head>
<body>
    <!-- 为ECharts准备一个具备大小（宽高）的Dom -->
    <div id="main" style="width:100%; height:600px"></div>

    <script>
        let main = document.getElementById('main');
        // 基于准备好的dom，初始化echarts实例
        let myChart = echarts.init(main);


        var base = +new Date(1968, 9, 3);
        var oneDay = 24 * 3600 * 1000;
        var date = [];

        var data = [Math.random() * 300];

        for (var i = 1; i < 20000; i++) {
            var now = new Date(base += oneDay);
            date.push([now.getFullYear(), now.getMonth() + 1, now.getDate()].join('-'));
            data.push(Math.round((Math.random() - 0.5) * 20 + data[i - 1]));
        }

        option = {
            tooltip: {
                trigger: 'axis',
                position: function (pt) {
                    return [pt[0], '10%'];
                }
            },
            title: {
                left: 'center',
                text: '大数据量折线图',
            },
            legend: {
                top: 'bottom',
                data:['意向']
            },
            toolbox: {
                show: true,
                feature: {
                    dataView: {show: true, readOnly: false},
                    magicType: {show: true, type: ['line', 'bar', 'stack', 'tiled']},
                    restore: {show: true},
                    saveAsImage: {show: true}
                }
            },
            xAxis: {
                type: 'category',
                boundaryGap: false,
                data: date
            },
            yAxis: {
                type: 'value',
                boundaryGap: [0, '100%']
            },
            // dataZoom
            dataZoom: [{
                type: 'slider',
                start: 10, // 起始位置 百分比计算的，范围0~100
                end: 40 // 终止位置
            }],
            series: [
                {
                    name:'模拟数据',
                    type:'line',
                    smooth:true,
                    symbol: 'none',
                    sampling: 'average',
                    itemStyle: {
                        normal: {
                            color: 'rgb(255, 70, 131)'
                        }
                    },
                    areaStyle: {
                        normal: {
                            color: new echarts.graphic.LinearGradient(0, 0, 0, 1, [{
                                offset: 0,
                                color: 'rgb(255, 158, 68)'
                            }, {
                                offset: 1,
                                color: 'rgb(255, 70, 131)'
                            }])
                        }
                    },
                    data: data
                }
            ]
        };

        // 使用刚指定的配置项和数据显示图表。
        myChart.setOption(option);
    </script>
</body>
</html>